Abstract: A pair of casual shoes such as flip-flops are packaged for sale so as to have the general appearance of an essentially spherical ball. Each shoe has a flexible sole portion and an upper portion connected to at least part of the periphery of the sole portion by stitching, which extends around the entire sole portion periphery. The sole portion of each shoe is flexed generally into a U-shape and also is flexed transversely to the length thereof, and then the two U-shapes are interfitted with the toe and heel regions of one shoe fitting against the instep region of the other shoe. An elongate cord is laced between the stitching around the peripheries of the two sole portions so as to hold the two shoes together in the ball shape but removal of the cord release the two shoes for separation and opening out into a pair of flip-flops.

Abstract: An electrical control unit operable as a rheostat or a potentiometer comprising an electrical circuit portion of a resistive electrically conducting material formed on a support in a spiral configuration, a spindle mounted for rotation about the center of the spiral, an arm non-rotatably engaged on the spindle but slidable relatively to the spindle radially with respect to the axis thereof, an electrical contact carried on the arm to move radially therewith, to make contact with said circuit portion, and a spiral guide means aligned with the circuit portion spiral and co-operable with the arm to guide said arm radially, so that the electrical contact follows the circuit portion spiral to alter the effective electrical resistance thereof in use.